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 ###Instrução: Qual visitante tem Tim Duncan (16) como o principal pontuador?
 ###Tabelas: CREATE TABLE december (december_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Visitor VARCHAR, Score VARCHAR, Home VARCHAR, Leading scorer VARCHAR, Record VARCHAR) CREATE TABLE list_of_rmsp_company_vessels (list_of_rmsp_company_vessels_id AUTO_INCREMENT PRIMARY KEY, Ship VARCHAR, Date Commissioned INT, Gross Tonnage INT, Propulsion VARCHAR, Material VARCHAR) CREATE TABLE cardinal_numbers (cardinal_numbers_id AUTO_INCREMENT PRIMARY KEY, Number notation INT, Power notation VARCHAR, Short scale VARCHAR, Long scale VARCHAR, Indian (or South Asian) English VARCHAR) CREATE TABLE list_of_member_schools (list_of_member_schools_id AUTO_INCREMENT PRIMARY KEY, School VARCHAR, Team Name VARCHAR, Town VARCHAR, County VARCHAR, School Enrollment (2008–10) INT, Football? VARCHAR) CREATE TABLE ohio_counties_ranked_by_per_capita_income (ohio_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT)  
SELECT Visitor FROM december WHERE Leading scorer = tim duncan (16)